Office: EE507
Phone: +90 312 290 1021
eMail: volkan[at]fen.bilkent.edu.tr
Professor, Ph.D.: Electrical Engineering, Stanford University, 2004
Light-emitting diodes (LEDs),semiconductor nanocrystal optoelectronics, energy transfer driven devices and sensors, nanoparticles/nanocomposites, nanophotonics, RF sensing bioimplants and medical devices.
Selected Publications
- B. Guzelturk, Y. Kelestemur, K. Gungor, A. Yeltik, M. Z. Akgul, Y. Wang, R. Chen, C. Dang, H. Sun and H. V. Demir, “Stable and Low Threshold Optical Gain in CdSe/CdS Quantum Dots: All-Colloidal Frequency Up-Converted Laser” Advanced Materials 27, 2678 (2015).
- M. Olutas, B. Guzelturk, Y. Kelestemur, A. Yeltik, S. Delikanli and H. V. Demir, “Lateral Size-Dependent Spontaneous and Stimulated Emission Properties in Colloidal CdSe Nanoplatelets” ACS Nano 9, 5041 (2015).
- S. Delikanli, B. Guzelturk, P. L. Hernández-Martínez, T. Erdem, Y. Kelestemur, M. Olutas, M. Z. Akgul and H. V. Demir, “Continuously Tunable Emission in Inverted Type-I CdS/CdSe Core/Crown Semiconductor Nanoplatelets” Advanced Functional Materials 25, 4282 (2015).
- B. Guzelturk, Y. Kelestemur, M. Olutas, S. Delikanli and H. V. Demir, “Amplified Spontaneous Emission and Lasing in Colloidal Nanoplatelets” ACS Nano 8, 6599 (2014).
- B. Guzelturk, O. Erdem, M. Olutas, Y. Kelestemur and H. V. Demir, “Stacking in colloidal nanoplatelets: excitonic properties” ACS Nano 8, 12524 (2014).
- Y. Ji, W. Liu, T. Erdem, R. Chen, S. T. Tan, Z.-H. Zhang, Z. Ju, X. Zhang, H. Sun, X. W. Sun, Y. Zhao, S. P. DenBaars, S. Nakamura and H. V. Demir, “Comparative study of field-dependent carrier dynamics and emission kinetics of InGaN/GaN light-emitting diodes grown on (11-22) semipolar versus (0001) polar planes” Applied Physics Letters104, 143506 (2014).
- A. O. Govorov, H. Zhang, H. V. Demir, Y. K. Gunko, “Photogeneration of hot plasmonic electrons with metal nanocrystals: Quantum description and potential applications” Nano Today 9, 85 (2014). Invited Paper.
- T. Özel, P. L. Hernandez-Martinez, E. Mutlugün, O. Akın, S. Nizamoğlu, İ. Ö. Özel, Q. Zhang, Q. Xiong and H. V. Demir, “Observation of Selective Plasmon-Exciton Coupling in Nonradiative Energy Transfer: Donor-Selective vs. Acceptor-Selective Plexcitons”Nano Letters 13, 3065 (2013).
- E. Mutlugün, P. L. Hernandez-Martinez, C. Eroğlu, Y. Coşkun, T. Erdem, V. K. Sharma, E. Ünal, S. K. Panda, S. G. Hickey, N. Gaponik, A. Eychmuller and H. V. Demir, “Large-area (over 50 cm x 50 cm) freestanding films of colloidal InP/ZnS quantum dots” Nano Letters 12, 3986 (2012).
- H. V. Demir, S. Nizamo lu, T. Erdem, E. Mutlugun, N. Gaponik, A. Eychmuller “Quantum dot integrated LEDs using photonic and excitonic color conversion,” Nano Today, 6, 632 (2011). Invited Paper.